Filter-bed.



Patonte d Dec. :3, i900.

J. c. WALLACE;

FILTER (Applicafign filed Sept. 1, 1900.)

um Model.)

a: uonms warms c'o, womuwo. WASHINGTON, n. c.

NITED STATES PATENT OFFICE.-

JAMES O. WALLACE, OF COLORADO CITY, COLORADO.

FILTER-BED.

SPECIFICATION forming part of Letters Patent No. 664,196, dated December 18, 1900.

Applicati n fil September 1, 1900. Serial No. 28,761. (No model.)

To all whom it may concern.-

Be it known that I, JAMES C. WALLACE, a citizen of Great Britain, (but having declared my intention of becoming a citizen of the United States,)-residing at Colorado City, in the county of El Paso and State of Colorado, have invented a new and useful Improvement in Filter-Beds, of which the following is a specification.

My invention relates to filter-barrels such as are used in the chlorination process of extracting precious metals from pulverized ores, and has special reference to a filtering-bed within said barrel. I have described elsewhere (in Patent No. 653,631, dated July 10, 1900, filed February 14:, 1900, S'erialNo. 5,231) the general process of extracting the precious metal by a similar method, so that it need notbe repeated here. All such filteringbarrels require within them a filtering surface or medium, practically separating the barrel into two generally unequal compartments, the larger one holding the ore, which is supported upon the upper surface of a filtering-bed, and the lower or smaller compartment holding the liquid solution which has drained through the filtering medium. It is the particularform, construction, and material of this filtering-bed which constitutes the subject-matter of my present invention and which I will now proceed to describe, reference being had to the accompanying drawings, in which Figure 1 represents a vertical longitudinal center section through one end (lower arc) of a horizontal filter-barrel. Fig. 2 represents a cross-section through this lower are on line w a; of Fig. 1.

The letter a in each case represents the circumferential wall of the barrel. A series of metal plates I) extend practically the whole length of the barrel, their adjoining edges abutting each its neighbor and secured by bolts or rivets c at their opposite ends to the inside of wall of the barrel (1,. These plates in Fig. 2 are shown as curved, which is the form I prefer using, although they may be fiat, a consideration being, however, that a space e be left between their under surface and the barrel-wall. This plate is seen in enlarged sectional View in Fig. 3 and in plan 'view in Fig. 4, with a cross-section through line y y in Fig. 5. The plate is perforated by longitudinal slots 01 61, through which the liquid finally drains to the space e. The longer parallel edges of each plate are turned up at right angles or finished with a small angle-iron edge, as at f. Upon this plate and confined between the edges f f I place a series of small tiles, which may be made of glazed pottery-ware or of a lead com position, the consideration being that they be made of a material not affected (or very slightly) by the chemical solution within the barrel. These tiles are represented in position in Figs. 2, 3, 4, and 5 by g g g and in larger detail by Fig. 6, which shows a plan view of a portion of two abutting tiles, a longitudinal vertical view, (beneath the plan,) and an end view of one of them. These tiles are perforated along their abutting surfaces by semicylindrical or conical holes h h h, very small in area and preferably tapering, as shown, the lower area of the holes connecting with or opening into a slotted area t' in the lower surface of each tile. These tiles form the filtering-bed, the liquid draining through the small holes it into the under slotted area i, thence through the slots d d of the plates 1), whence it drops and is collected in the lower compartment (2 of the barrel a. The tiles g g g are held down in position by the imposed metal binders k k, which are fastened by the keys min the head at, this head a being riveted by its neck 0 to the plate 5, as shown. A short angle-ironp is fastened to the plate I) at either end by means of the neck 0 or by separate rivets, the purpose of this angle-iron being to confine the end tiles g. It must be understood that all these metal parts are coated with lead to prevent chemical action thereon by the liquid.

Having described my invention, what I claim as new and original, and desire to secure by Letters Patent, is

1. In a filter barrel or tank, a tile having two rows of vertical semicircular holes along its two opposite vertical surfaces and connecting with a drain area, channel, or cavity recessed in the lower surface of said tile;

substantially as shown.

2. In a filter-barrel, a filter-bed consisting means for fastening or confining the same toof a series of metal plates having drain slots getherand to theinner wall ofa filterbarrelor or perforations theretln'ongb, a series of pertank; substantially as described and shown. [0 forated tiles arranged as a filtering medium JAMES C. WALLACE. upon and supported by said metal plates, a \Vitnesses: series of metal binding-strips imposed upon MATTHEW KENNEDY,

or against said tiles; together with suitable W. H. R. STOTE. 

